* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

#content {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
}

.item {
    padding: 20px;
    margin-bottom: 15px;
    background: #f5f5f5;
    border-radius: 5px;
}

#loading {
    text-align: center;
    padding: 20px;
    display: none;
}